{"refrec":{"BRefID":323651,"RR":"<b>Åström, E.K.L.; Carroll, M.; Sen, A.; Niemann, H.; Ambrose, W.G.; Lehmann, M.F.; Carroll, J.</b> (2019). Chemosynthesis influences food web and community structure in high-Arctic benthos. <i>Mar. Ecol. Prog. Ser. 629</i>: 19-42. <a href=\"https://dx.doi.org/10.3354/meps13101\" target=\"_blank\">https://dx.doi.org/10.3354/meps13101</a>","BEntID":317123,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":1,"RefStringPartII":". <i>Mar. Ecol. Prog. Ser. 629</i>: 19-42. <a href=\"https://dx.doi.org/10.3354/meps13101\" target=\"_blank\">https://dx.doi.org/10.3354/meps13101</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Åström, E.K.L.; Carroll, M.; Sen, A.; Niemann, H.; Ambrose, W.G.; Lehmann, M.F.; Carroll, J.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Åström, E.K.L. <i>et al.</i>","Englishabstract":"Cold seeps are locations where seafloor communities are influenced by the seepage of methane and other reduced compounds from the seabed. We examined macro-infaunal benthos through community analysis and trophic structure using stable isotope analysis at 3 seep locations in the Barents Sea. These seeps were characterized by high densities of the chemosymbiotic polychaetes Siboglinidae, clade Frenulata (up to 32120 ind. m<sup>-2</sup>), and thyasirid bivalves, <i<Mendicula</i> cf. <i>pygmaea</i> (up to 4770 ind. m<sup>-2</sup>). We detected low δ<sup>13</sup>C signatures in chemosymbiotic polychaetes and in 3 species of omnivorous/predatory polychaetes. These δ<sup>13</sup>C signatures indicate the input of chemosynthesis-based carbon (CBC) into the food web. Applying a 2-source mixing model, we demonstrated that 28-41% of the nutrition of non-chemosymbiotic polychaetes originates from CBC. We also documented large community variations and small-scale variability within and among the investigated seeps, showing that the impact of seepage on faunal community structure transcends geographic boundaries within the Barents Sea. Moreover, aggregations of heterotrophic macro- and megafauna associated with characteristic seep features (microbial mats, carbonate outcrops, and chemosymbiotic worm-tufts) add 3-dimensional structure and habitat complexity to the seafloor. Cold seeps contribute to the hydrocarbon-derived chemoautotrophy component of these ecosystems and to habitat complexity. These characteristics make the cold seeps of potential high ecological relevance in the functioning of the larger Arctic-Barents Sea ecosystem.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"Chemosynthesis influences food web and community structure in high-Arctic benthos","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-06-05 01:31:20.034574","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"Cold seeps; Benthos; Methane; Trophic structure; Stable isotopes; Barents Sea; Svalbard","OtherDescriptors":null,"Notes":null,"AnaPub":2019,"MonPub":null,"DateUpdate":"2020-04-28","DateCreate":"2020-04-28","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000521168400002","VABBcode":null,"OpenAcc":1,"DOI":"10.3354/meps13101"},"refs":null,"anarec":{"AnaID":323651,"PubliDate":2019,"Pagination":"19-42","XtraPublOfAnaID":null,"ISBN":null,"Volume":"629","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":43354,"SerRR":"Marine Ecology Progress Series. 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